28256912 has 10 divisors (see below), whose sum is σ = 54747798. Its totient is φ = 14128448.

The previous prime is 28256887. The next prime is 28256927. The reversal of 28256912 is 21965282.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20214016 + 8042896 = 4496^2 + 2836^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 883013 + ... + 883044.

Almost surely, 2^28256912 is an apocalyptic number.

It is an amenable number.

28256912 is a deficient number, since it is larger than the sum of its proper divisors (26490886).

28256912 is a wasteful number, since it uses less digits than its factorization.

28256912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766065 (or 1766059 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 28256912 is about 5315.7230928633. The cubic root of 28256912 is about 304.5848045767.

The spelling of 28256912 in words is "twenty-eight million, two hundred fifty-six thousand, nine hundred twelve".